Which describes the requirements for making an electromagnet?

Question

anonymous · Answer

A.
A battery, a length of wire, and an iron nail must be connected in a closed series circuit. In addition, the wire must be coiled around the body of the nail.
 
 B.
A battery, a length of wire, and an iron nail must be connected in an open series circuit. In addition, the wire must be coiled around the body of the battery.
 
 C.
A battery, a length of wire, and an iron nail must be connected in a closed parallel circuit. In addition, the wire must be coiled around the body of the nail.
 
 D.
A battery, a length of wire, and an iron nail must be connected in an open parallel circuit. In addition, the wire must be coiled around the body of the battery.

anonymous · Answer

A